asus-laptop.c revision 977c328d81e31fde70c5ba381d9cf7357451dd74
1/* 2 * asus-laptop.c - Asus Laptop Support 3 * 4 * 5 * Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor 6 * Copyright (C) 2006-2007 Corentin Chary 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 * 23 * The development page for this driver is located at 24 * http://sourceforge.net/projects/acpi4asus/ 25 * 26 * Credits: 27 * Pontus Fuchs - Helper functions, cleanup 28 * Johann Wiesner - Small compile fixes 29 * John Belmonte - ACPI code for Toshiba laptop was a good starting point. 30 * Eric Burghard - LED display support for W1N 31 * Josh Green - Light Sens support 32 * Thomas Tuttle - His first patch for led support was very helpfull 33 * Sam Lin - GPS support 34 */ 35 36#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 37 38#include <linux/kernel.h> 39#include <linux/module.h> 40#include <linux/init.h> 41#include <linux/types.h> 42#include <linux/err.h> 43#include <linux/proc_fs.h> 44#include <linux/backlight.h> 45#include <linux/fb.h> 46#include <linux/leds.h> 47#include <linux/platform_device.h> 48#include <acpi/acpi_drivers.h> 49#include <acpi/acpi_bus.h> 50#include <asm/uaccess.h> 51#include <linux/input.h> 52 53#define ASUS_LAPTOP_VERSION "0.42" 54 55#define ASUS_HOTK_NAME "Asus Laptop Support" 56#define ASUS_HOTK_CLASS "hotkey" 57#define ASUS_HOTK_DEVICE_NAME "Hotkey" 58#define ASUS_HOTK_FILE KBUILD_MODNAME 59#define ASUS_HOTK_PREFIX "\\_SB.ATKD." 60 61 62/* 63 * Some events we use, same for all Asus 64 */ 65#define ATKD_BR_UP 0x10 66#define ATKD_BR_DOWN 0x20 67#define ATKD_LCD_ON 0x33 68#define ATKD_LCD_OFF 0x34 69 70/* 71 * Known bits returned by \_SB.ATKD.HWRS 72 */ 73#define WL_HWRS 0x80 74#define BT_HWRS 0x100 75 76/* 77 * Flags for hotk status 78 * WL_ON and BT_ON are also used for wireless_status() 79 */ 80#define WL_ON 0x01 //internal Wifi 81#define BT_ON 0x02 //internal Bluetooth 82#define MLED_ON 0x04 //mail LED 83#define TLED_ON 0x08 //touchpad LED 84#define RLED_ON 0x10 //Record LED 85#define PLED_ON 0x20 //Phone LED 86#define GLED_ON 0x40 //Gaming LED 87#define LCD_ON 0x80 //LCD backlight 88#define GPS_ON 0x100 //GPS 89 90#define ASUS_LOG ASUS_HOTK_FILE ": " 91#define ASUS_ERR KERN_ERR ASUS_LOG 92#define ASUS_WARNING KERN_WARNING ASUS_LOG 93#define ASUS_NOTICE KERN_NOTICE ASUS_LOG 94#define ASUS_INFO KERN_INFO ASUS_LOG 95#define ASUS_DEBUG KERN_DEBUG ASUS_LOG 96 97MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary"); 98MODULE_DESCRIPTION(ASUS_HOTK_NAME); 99MODULE_LICENSE("GPL"); 100 101/* WAPF defines the behavior of the Fn+Fx wlan key 102 * The significance of values is yet to be found, but 103 * most of the time: 104 * 0x0 will do nothing 105 * 0x1 will allow to control the device with Fn+Fx key. 106 * 0x4 will send an ACPI event (0x88) while pressing the Fn+Fx key 107 * 0x5 like 0x1 or 0x4 108 * So, if something doesn't work as you want, just try other values =) 109 */ 110static uint wapf = 1; 111module_param(wapf, uint, 0644); 112MODULE_PARM_DESC(wapf, "WAPF value"); 113 114#define ASUS_HANDLE(object, paths...) \ 115 static acpi_handle object##_handle = NULL; \ 116 static char *object##_paths[] = { paths } 117 118/* LED */ 119ASUS_HANDLE(mled_set, ASUS_HOTK_PREFIX "MLED"); 120ASUS_HANDLE(tled_set, ASUS_HOTK_PREFIX "TLED"); 121ASUS_HANDLE(rled_set, ASUS_HOTK_PREFIX "RLED"); /* W1JC */ 122ASUS_HANDLE(pled_set, ASUS_HOTK_PREFIX "PLED"); /* A7J */ 123ASUS_HANDLE(gled_set, ASUS_HOTK_PREFIX "GLED"); /* G1, G2 (probably) */ 124 125/* LEDD */ 126ASUS_HANDLE(ledd_set, ASUS_HOTK_PREFIX "SLCM"); 127 128/* Bluetooth and WLAN 129 * WLED and BLED are not handled like other XLED, because in some dsdt 130 * they also control the WLAN/Bluetooth device. 131 */ 132ASUS_HANDLE(wl_switch, ASUS_HOTK_PREFIX "WLED"); 133ASUS_HANDLE(bt_switch, ASUS_HOTK_PREFIX "BLED"); 134ASUS_HANDLE(wireless_status, ASUS_HOTK_PREFIX "RSTS"); /* All new models */ 135 136/* Brightness */ 137ASUS_HANDLE(brightness_set, ASUS_HOTK_PREFIX "SPLV"); 138ASUS_HANDLE(brightness_get, ASUS_HOTK_PREFIX "GPLV"); 139 140/* Backlight */ 141ASUS_HANDLE(lcd_switch, "\\_SB.PCI0.SBRG.EC0._Q10", /* All new models */ 142 "\\_SB.PCI0.ISA.EC0._Q10", /* A1x */ 143 "\\_SB.PCI0.PX40.ECD0._Q10", /* L3C */ 144 "\\_SB.PCI0.PX40.EC0.Q10", /* M1A */ 145 "\\_SB.PCI0.LPCB.EC0._Q10", /* P30 */ 146 "\\_SB.PCI0.LPCB.EC0._Q0E", /* P30/P35 */ 147 "\\_SB.PCI0.PX40.Q10", /* S1x */ 148 "\\Q10"); /* A2x, L2D, L3D, M2E */ 149 150/* Display */ 151ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP"); 152ASUS_HANDLE(display_get, "\\_SB.PCI0.P0P1.VGA.GETD", /* A6B, A6K A6R A7D F3JM L4R M6R A3G 153 M6A M6V VX-1 V6J V6V W3Z */ 154 "\\_SB.PCI0.P0P2.VGA.GETD", /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V 155 S5A M5A z33A W1Jc W2V G1 */ 156 "\\_SB.PCI0.P0P3.VGA.GETD", /* A6V A6Q */ 157 "\\_SB.PCI0.P0PA.VGA.GETD", /* A6T, A6M */ 158 "\\_SB.PCI0.PCI1.VGAC.NMAP", /* L3C */ 159 "\\_SB.PCI0.VGA.GETD", /* Z96F */ 160 "\\ACTD", /* A2D */ 161 "\\ADVG", /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */ 162 "\\DNXT", /* P30 */ 163 "\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */ 164 "\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */ 165 166ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */ 167ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */ 168 169/* GPS */ 170/* R2H use different handle for GPS on/off */ 171ASUS_HANDLE(gps_on, ASUS_HOTK_PREFIX "SDON"); /* R2H */ 172ASUS_HANDLE(gps_off, ASUS_HOTK_PREFIX "SDOF"); /* R2H */ 173ASUS_HANDLE(gps_status, ASUS_HOTK_PREFIX "GPST"); 174 175/* 176 * This is the main structure, we can use it to store anything interesting 177 * about the hotk device 178 */ 179struct asus_hotk { 180 char *name; //laptop name 181 struct acpi_device *device; //the device we are in 182 acpi_handle handle; //the handle of the hotk device 183 char status; //status of the hotk, for LEDs, ... 184 u32 ledd_status; //status of the LED display 185 u8 light_level; //light sensor level 186 u8 light_switch; //light sensor switch value 187 u16 event_count[128]; //count for each event TODO make this better 188 struct input_dev *inputdev; 189 u16 *keycode_map; 190}; 191 192/* 193 * This header is made available to allow proper configuration given model, 194 * revision number , ... this info cannot go in struct asus_hotk because it is 195 * available before the hotk 196 */ 197static struct acpi_table_header *asus_info; 198 199/* The actual device the driver binds to */ 200static struct asus_hotk *hotk; 201 202/* 203 * The hotkey driver declaration 204 */ 205static const struct acpi_device_id asus_device_ids[] = { 206 {"ATK0100", 0}, 207 {"", 0}, 208}; 209MODULE_DEVICE_TABLE(acpi, asus_device_ids); 210 211static int asus_hotk_add(struct acpi_device *device); 212static int asus_hotk_remove(struct acpi_device *device, int type); 213static void asus_hotk_notify(struct acpi_device *device, u32 event); 214 215static struct acpi_driver asus_hotk_driver = { 216 .name = ASUS_HOTK_NAME, 217 .class = ASUS_HOTK_CLASS, 218 .ids = asus_device_ids, 219 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, 220 .ops = { 221 .add = asus_hotk_add, 222 .remove = asus_hotk_remove, 223 .notify = asus_hotk_notify, 224 }, 225}; 226 227/* The backlight device /sys/class/backlight */ 228static struct backlight_device *asus_backlight_device; 229 230/* 231 * The backlight class declaration 232 */ 233static int read_brightness(struct backlight_device *bd); 234static int update_bl_status(struct backlight_device *bd); 235static struct backlight_ops asusbl_ops = { 236 .get_brightness = read_brightness, 237 .update_status = update_bl_status, 238}; 239 240/* These functions actually update the LED's, and are called from a 241 * workqueue. By doing this as separate work rather than when the LED 242 * subsystem asks, we avoid messing with the Asus ACPI stuff during a 243 * potentially bad time, such as a timer interrupt. */ 244static struct workqueue_struct *led_workqueue; 245 246#define ASUS_LED(object, ledname, max) \ 247 static void object##_led_set(struct led_classdev *led_cdev, \ 248 enum led_brightness value); \ 249 static enum led_brightness object##_led_get( \ 250 struct led_classdev *led_cdev); \ 251 static void object##_led_update(struct work_struct *ignored); \ 252 static int object##_led_wk; \ 253 static DECLARE_WORK(object##_led_work, object##_led_update); \ 254 static struct led_classdev object##_led = { \ 255 .name = "asus::" ledname, \ 256 .brightness_set = object##_led_set, \ 257 .brightness_get = object##_led_get, \ 258 .max_brightness = max \ 259 } 260 261ASUS_LED(mled, "mail", 1); 262ASUS_LED(tled, "touchpad", 1); 263ASUS_LED(rled, "record", 1); 264ASUS_LED(pled, "phone", 1); 265ASUS_LED(gled, "gaming", 1); 266 267struct key_entry { 268 char type; 269 u8 code; 270 u16 keycode; 271}; 272 273enum { KE_KEY, KE_END }; 274 275static struct key_entry asus_keymap[] = { 276 {KE_KEY, 0x30, KEY_VOLUMEUP}, 277 {KE_KEY, 0x31, KEY_VOLUMEDOWN}, 278 {KE_KEY, 0x32, KEY_MUTE}, 279 {KE_KEY, 0x33, KEY_SWITCHVIDEOMODE}, 280 {KE_KEY, 0x34, KEY_SWITCHVIDEOMODE}, 281 {KE_KEY, 0x40, KEY_PREVIOUSSONG}, 282 {KE_KEY, 0x41, KEY_NEXTSONG}, 283 {KE_KEY, 0x43, KEY_STOPCD}, 284 {KE_KEY, 0x45, KEY_PLAYPAUSE}, 285 {KE_KEY, 0x50, KEY_EMAIL}, 286 {KE_KEY, 0x51, KEY_WWW}, 287 {KE_KEY, 0x5C, KEY_SCREENLOCK}, /* Screenlock */ 288 {KE_KEY, 0x5D, KEY_WLAN}, 289 {KE_KEY, 0x5E, KEY_WLAN}, 290 {KE_KEY, 0x5F, KEY_WLAN}, 291 {KE_KEY, 0x60, KEY_SWITCHVIDEOMODE}, 292 {KE_KEY, 0x61, KEY_SWITCHVIDEOMODE}, 293 {KE_KEY, 0x6B, BTN_TOUCH}, /* Lock Mouse */ 294 {KE_KEY, 0x82, KEY_CAMERA}, 295 {KE_KEY, 0x8A, KEY_PROG1}, 296 {KE_KEY, 0x95, KEY_MEDIA}, 297 {KE_KEY, 0x99, KEY_PHONE}, 298 {KE_END, 0}, 299}; 300 301/* 302 * This function evaluates an ACPI method, given an int as parameter, the 303 * method is searched within the scope of the handle, can be NULL. The output 304 * of the method is written is output, which can also be NULL 305 * 306 * returns 0 if write is successful, -1 else. 307 */ 308static int write_acpi_int(acpi_handle handle, const char *method, int val, 309 struct acpi_buffer *output) 310{ 311 struct acpi_object_list params; //list of input parameters (an int here) 312 union acpi_object in_obj; //the only param we use 313 acpi_status status; 314 315 if (!handle) 316 return 0; 317 318 params.count = 1; 319 params.pointer = &in_obj; 320 in_obj.type = ACPI_TYPE_INTEGER; 321 in_obj.integer.value = val; 322 323 status = acpi_evaluate_object(handle, (char *)method, ¶ms, output); 324 if (status == AE_OK) 325 return 0; 326 else 327 return -1; 328} 329 330static int read_wireless_status(int mask) 331{ 332 unsigned long long status; 333 acpi_status rv = AE_OK; 334 335 if (!wireless_status_handle) 336 return (hotk->status & mask) ? 1 : 0; 337 338 rv = acpi_evaluate_integer(wireless_status_handle, NULL, NULL, &status); 339 if (ACPI_FAILURE(rv)) 340 pr_warning("Error reading Wireless status\n"); 341 else 342 return (status & mask) ? 1 : 0; 343 344 return (hotk->status & mask) ? 1 : 0; 345} 346 347static int read_gps_status(void) 348{ 349 unsigned long long status; 350 acpi_status rv = AE_OK; 351 352 rv = acpi_evaluate_integer(gps_status_handle, NULL, NULL, &status); 353 if (ACPI_FAILURE(rv)) 354 pr_warning("Error reading GPS status\n"); 355 else 356 return status ? 1 : 0; 357 358 return (hotk->status & GPS_ON) ? 1 : 0; 359} 360 361/* Generic LED functions */ 362static int read_status(int mask) 363{ 364 /* There is a special method for both wireless devices */ 365 if (mask == BT_ON || mask == WL_ON) 366 return read_wireless_status(mask); 367 else if (mask == GPS_ON) 368 return read_gps_status(); 369 370 return (hotk->status & mask) ? 1 : 0; 371} 372 373static void write_status(acpi_handle handle, int out, int mask) 374{ 375 hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask); 376 377 switch (mask) { 378 case MLED_ON: 379 out = !(out & 0x1); 380 break; 381 case GLED_ON: 382 out = (out & 0x1) + 1; 383 break; 384 case GPS_ON: 385 handle = (out) ? gps_on_handle : gps_off_handle; 386 out = 0x02; 387 break; 388 default: 389 out &= 0x1; 390 break; 391 } 392 393 if (write_acpi_int(handle, NULL, out, NULL)) 394 pr_warning(" write failed %x\n", mask); 395} 396 397/* /sys/class/led handlers */ 398#define ASUS_LED_HANDLER(object, mask) \ 399 static void object##_led_set(struct led_classdev *led_cdev, \ 400 enum led_brightness value) \ 401 { \ 402 object##_led_wk = (value > 0) ? 1 : 0; \ 403 queue_work(led_workqueue, &object##_led_work); \ 404 } \ 405 static void object##_led_update(struct work_struct *ignored) \ 406 { \ 407 int value = object##_led_wk; \ 408 write_status(object##_set_handle, value, (mask)); \ 409 } \ 410 static enum led_brightness object##_led_get( \ 411 struct led_classdev *led_cdev) \ 412 { \ 413 return led_cdev->brightness; \ 414 } 415 416ASUS_LED_HANDLER(mled, MLED_ON); 417ASUS_LED_HANDLER(pled, PLED_ON); 418ASUS_LED_HANDLER(rled, RLED_ON); 419ASUS_LED_HANDLER(tled, TLED_ON); 420ASUS_LED_HANDLER(gled, GLED_ON); 421 422static int get_lcd_state(void) 423{ 424 return read_status(LCD_ON); 425} 426 427static int set_lcd_state(int value) 428{ 429 int lcd = 0; 430 acpi_status status = 0; 431 432 lcd = value ? 1 : 0; 433 434 if (lcd == get_lcd_state()) 435 return 0; 436 437 if (lcd_switch_handle) { 438 status = acpi_evaluate_object(lcd_switch_handle, 439 NULL, NULL, NULL); 440 441 if (ACPI_FAILURE(status)) 442 pr_warning("Error switching LCD\n"); 443 } 444 445 write_status(NULL, lcd, LCD_ON); 446 return 0; 447} 448 449static void lcd_blank(int blank) 450{ 451 struct backlight_device *bd = asus_backlight_device; 452 453 if (bd) { 454 bd->props.power = blank; 455 backlight_update_status(bd); 456 } 457} 458 459static int read_brightness(struct backlight_device *bd) 460{ 461 unsigned long long value; 462 acpi_status rv = AE_OK; 463 464 rv = acpi_evaluate_integer(brightness_get_handle, NULL, NULL, &value); 465 if (ACPI_FAILURE(rv)) 466 pr_warning("Error reading brightness\n"); 467 468 return value; 469} 470 471static int set_brightness(struct backlight_device *bd, int value) 472{ 473 int ret = 0; 474 475 value = (0 < value) ? ((15 < value) ? 15 : value) : 0; 476 /* 0 <= value <= 15 */ 477 478 if (write_acpi_int(brightness_set_handle, NULL, value, NULL)) { 479 pr_warning("Error changing brightness\n"); 480 ret = -EIO; 481 } 482 483 return ret; 484} 485 486static int update_bl_status(struct backlight_device *bd) 487{ 488 int rv; 489 int value = bd->props.brightness; 490 491 rv = set_brightness(bd, value); 492 if (rv) 493 return rv; 494 495 value = (bd->props.power == FB_BLANK_UNBLANK) ? 1 : 0; 496 return set_lcd_state(value); 497} 498 499/* 500 * Platform device handlers 501 */ 502 503/* 504 * We write our info in page, we begin at offset off and cannot write more 505 * than count bytes. We set eof to 1 if we handle those 2 values. We return the 506 * number of bytes written in page 507 */ 508static ssize_t show_infos(struct device *dev, 509 struct device_attribute *attr, char *page) 510{ 511 int len = 0; 512 unsigned long long temp; 513 char buf[16]; //enough for all info 514 acpi_status rv = AE_OK; 515 516 /* 517 * We use the easy way, we don't care of off and count, so we don't set eof 518 * to 1 519 */ 520 521 len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n"); 522 len += sprintf(page + len, "Model reference : %s\n", hotk->name); 523 /* 524 * The SFUN method probably allows the original driver to get the list 525 * of features supported by a given model. For now, 0x0100 or 0x0800 526 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card. 527 * The significance of others is yet to be found. 528 */ 529 rv = acpi_evaluate_integer(hotk->handle, "SFUN", NULL, &temp); 530 if (!ACPI_FAILURE(rv)) 531 len += sprintf(page + len, "SFUN value : %#x\n", 532 (uint) temp); 533 /* 534 * The HWRS method return informations about the hardware. 535 * 0x80 bit is for WLAN, 0x100 for Bluetooth. 536 * The significance of others is yet to be found. 537 * If we don't find the method, we assume the device are present. 538 */ 539 rv = acpi_evaluate_integer(hotk->handle, "HRWS", NULL, &temp); 540 if (!ACPI_FAILURE(rv)) 541 len += sprintf(page + len, "HRWS value : %#x\n", 542 (uint) temp); 543 /* 544 * Another value for userspace: the ASYM method returns 0x02 for 545 * battery low and 0x04 for battery critical, its readings tend to be 546 * more accurate than those provided by _BST. 547 * Note: since not all the laptops provide this method, errors are 548 * silently ignored. 549 */ 550 rv = acpi_evaluate_integer(hotk->handle, "ASYM", NULL, &temp); 551 if (!ACPI_FAILURE(rv)) 552 len += sprintf(page + len, "ASYM value : %#x\n", 553 (uint) temp); 554 if (asus_info) { 555 snprintf(buf, 16, "%d", asus_info->length); 556 len += sprintf(page + len, "DSDT length : %s\n", buf); 557 snprintf(buf, 16, "%d", asus_info->checksum); 558 len += sprintf(page + len, "DSDT checksum : %s\n", buf); 559 snprintf(buf, 16, "%d", asus_info->revision); 560 len += sprintf(page + len, "DSDT revision : %s\n", buf); 561 snprintf(buf, 7, "%s", asus_info->oem_id); 562 len += sprintf(page + len, "OEM id : %s\n", buf); 563 snprintf(buf, 9, "%s", asus_info->oem_table_id); 564 len += sprintf(page + len, "OEM table id : %s\n", buf); 565 snprintf(buf, 16, "%x", asus_info->oem_revision); 566 len += sprintf(page + len, "OEM revision : 0x%s\n", buf); 567 snprintf(buf, 5, "%s", asus_info->asl_compiler_id); 568 len += sprintf(page + len, "ASL comp vendor id : %s\n", buf); 569 snprintf(buf, 16, "%x", asus_info->asl_compiler_revision); 570 len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf); 571 } 572 573 return len; 574} 575 576static int parse_arg(const char *buf, unsigned long count, int *val) 577{ 578 if (!count) 579 return 0; 580 if (count > 31) 581 return -EINVAL; 582 if (sscanf(buf, "%i", val) != 1) 583 return -EINVAL; 584 return count; 585} 586 587static ssize_t store_status(const char *buf, size_t count, 588 acpi_handle handle, int mask) 589{ 590 int rv, value; 591 int out = 0; 592 593 rv = parse_arg(buf, count, &value); 594 if (rv > 0) 595 out = value ? 1 : 0; 596 597 write_status(handle, out, mask); 598 599 return rv; 600} 601 602/* 603 * LEDD display 604 */ 605static ssize_t show_ledd(struct device *dev, 606 struct device_attribute *attr, char *buf) 607{ 608 return sprintf(buf, "0x%08x\n", hotk->ledd_status); 609} 610 611static ssize_t store_ledd(struct device *dev, struct device_attribute *attr, 612 const char *buf, size_t count) 613{ 614 int rv, value; 615 616 rv = parse_arg(buf, count, &value); 617 if (rv > 0) { 618 if (write_acpi_int(ledd_set_handle, NULL, value, NULL)) 619 pr_warning("LED display write failed\n"); 620 else 621 hotk->ledd_status = (u32) value; 622 } 623 return rv; 624} 625 626/* 627 * WLAN 628 */ 629static ssize_t show_wlan(struct device *dev, 630 struct device_attribute *attr, char *buf) 631{ 632 return sprintf(buf, "%d\n", read_status(WL_ON)); 633} 634 635static ssize_t store_wlan(struct device *dev, struct device_attribute *attr, 636 const char *buf, size_t count) 637{ 638 return store_status(buf, count, wl_switch_handle, WL_ON); 639} 640 641/* 642 * Bluetooth 643 */ 644static ssize_t show_bluetooth(struct device *dev, 645 struct device_attribute *attr, char *buf) 646{ 647 return sprintf(buf, "%d\n", read_status(BT_ON)); 648} 649 650static ssize_t store_bluetooth(struct device *dev, 651 struct device_attribute *attr, const char *buf, 652 size_t count) 653{ 654 return store_status(buf, count, bt_switch_handle, BT_ON); 655} 656 657/* 658 * Display 659 */ 660static void set_display(int value) 661{ 662 /* no sanity check needed for now */ 663 if (write_acpi_int(display_set_handle, NULL, value, NULL)) 664 pr_warning("Error setting display\n"); 665 return; 666} 667 668static int read_display(void) 669{ 670 unsigned long long value = 0; 671 acpi_status rv = AE_OK; 672 673 /* In most of the case, we know how to set the display, but sometime 674 we can't read it */ 675 if (display_get_handle) { 676 rv = acpi_evaluate_integer(display_get_handle, NULL, 677 NULL, &value); 678 if (ACPI_FAILURE(rv)) 679 pr_warning("Error reading display status\n"); 680 } 681 682 value &= 0x0F; /* needed for some models, shouldn't hurt others */ 683 684 return value; 685} 686 687/* 688 * Now, *this* one could be more user-friendly, but so far, no-one has 689 * complained. The significance of bits is the same as in store_disp() 690 */ 691static ssize_t show_disp(struct device *dev, 692 struct device_attribute *attr, char *buf) 693{ 694 return sprintf(buf, "%d\n", read_display()); 695} 696 697/* 698 * Experimental support for display switching. As of now: 1 should activate 699 * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI. 700 * Any combination (bitwise) of these will suffice. I never actually tested 4 701 * displays hooked up simultaneously, so be warned. See the acpi4asus README 702 * for more info. 703 */ 704static ssize_t store_disp(struct device *dev, struct device_attribute *attr, 705 const char *buf, size_t count) 706{ 707 int rv, value; 708 709 rv = parse_arg(buf, count, &value); 710 if (rv > 0) 711 set_display(value); 712 return rv; 713} 714 715/* 716 * Light Sens 717 */ 718static void set_light_sens_switch(int value) 719{ 720 if (write_acpi_int(ls_switch_handle, NULL, value, NULL)) 721 pr_warning("Error setting light sensor switch\n"); 722 hotk->light_switch = value; 723} 724 725static ssize_t show_lssw(struct device *dev, 726 struct device_attribute *attr, char *buf) 727{ 728 return sprintf(buf, "%d\n", hotk->light_switch); 729} 730 731static ssize_t store_lssw(struct device *dev, struct device_attribute *attr, 732 const char *buf, size_t count) 733{ 734 int rv, value; 735 736 rv = parse_arg(buf, count, &value); 737 if (rv > 0) 738 set_light_sens_switch(value ? 1 : 0); 739 740 return rv; 741} 742 743static void set_light_sens_level(int value) 744{ 745 if (write_acpi_int(ls_level_handle, NULL, value, NULL)) 746 pr_warning("Error setting light sensor level\n"); 747 hotk->light_level = value; 748} 749 750static ssize_t show_lslvl(struct device *dev, 751 struct device_attribute *attr, char *buf) 752{ 753 return sprintf(buf, "%d\n", hotk->light_level); 754} 755 756static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr, 757 const char *buf, size_t count) 758{ 759 int rv, value; 760 761 rv = parse_arg(buf, count, &value); 762 if (rv > 0) { 763 value = (0 < value) ? ((15 < value) ? 15 : value) : 0; 764 /* 0 <= value <= 15 */ 765 set_light_sens_level(value); 766 } 767 768 return rv; 769} 770 771/* 772 * GPS 773 */ 774static ssize_t show_gps(struct device *dev, 775 struct device_attribute *attr, char *buf) 776{ 777 return sprintf(buf, "%d\n", read_status(GPS_ON)); 778} 779 780static ssize_t store_gps(struct device *dev, struct device_attribute *attr, 781 const char *buf, size_t count) 782{ 783 return store_status(buf, count, NULL, GPS_ON); 784} 785 786/* 787 * Hotkey functions 788 */ 789static struct key_entry *asus_get_entry_by_scancode(int code) 790{ 791 struct key_entry *key; 792 793 for (key = asus_keymap; key->type != KE_END; key++) 794 if (code == key->code) 795 return key; 796 797 return NULL; 798} 799 800static struct key_entry *asus_get_entry_by_keycode(int code) 801{ 802 struct key_entry *key; 803 804 for (key = asus_keymap; key->type != KE_END; key++) 805 if (code == key->keycode && key->type == KE_KEY) 806 return key; 807 808 return NULL; 809} 810 811static int asus_getkeycode(struct input_dev *dev, int scancode, int *keycode) 812{ 813 struct key_entry *key = asus_get_entry_by_scancode(scancode); 814 815 if (key && key->type == KE_KEY) { 816 *keycode = key->keycode; 817 return 0; 818 } 819 820 return -EINVAL; 821} 822 823static int asus_setkeycode(struct input_dev *dev, int scancode, int keycode) 824{ 825 struct key_entry *key; 826 int old_keycode; 827 828 if (keycode < 0 || keycode > KEY_MAX) 829 return -EINVAL; 830 831 key = asus_get_entry_by_scancode(scancode); 832 if (key && key->type == KE_KEY) { 833 old_keycode = key->keycode; 834 key->keycode = keycode; 835 set_bit(keycode, dev->keybit); 836 if (!asus_get_entry_by_keycode(old_keycode)) 837 clear_bit(old_keycode, dev->keybit); 838 return 0; 839 } 840 841 return -EINVAL; 842} 843 844static void asus_hotk_notify(struct acpi_device *device, u32 event) 845{ 846 static struct key_entry *key; 847 u16 count; 848 849 /* TODO Find a better way to handle events count. */ 850 if (!hotk) 851 return; 852 853 /* 854 * We need to tell the backlight device when the backlight power is 855 * switched 856 */ 857 if (event == ATKD_LCD_ON) { 858 write_status(NULL, 1, LCD_ON); 859 lcd_blank(FB_BLANK_UNBLANK); 860 } else if (event == ATKD_LCD_OFF) { 861 write_status(NULL, 0, LCD_ON); 862 lcd_blank(FB_BLANK_POWERDOWN); 863 } 864 865 count = hotk->event_count[event % 128]++; 866 acpi_bus_generate_proc_event(hotk->device, event, count); 867 acpi_bus_generate_netlink_event(hotk->device->pnp.device_class, 868 dev_name(&hotk->device->dev), event, 869 count); 870 871 if (hotk->inputdev) { 872 key = asus_get_entry_by_scancode(event); 873 if (!key) 874 return ; 875 876 switch (key->type) { 877 case KE_KEY: 878 input_report_key(hotk->inputdev, key->keycode, 1); 879 input_sync(hotk->inputdev); 880 input_report_key(hotk->inputdev, key->keycode, 0); 881 input_sync(hotk->inputdev); 882 break; 883 } 884 } 885} 886 887#define ASUS_CREATE_DEVICE_ATTR(_name) \ 888 struct device_attribute dev_attr_##_name = { \ 889 .attr = { \ 890 .name = __stringify(_name), \ 891 .mode = 0 }, \ 892 .show = NULL, \ 893 .store = NULL, \ 894 } 895 896#define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \ 897 do { \ 898 dev_attr_##_name.attr.mode = _mode; \ 899 dev_attr_##_name.show = _show; \ 900 dev_attr_##_name.store = _store; \ 901 } while(0) 902 903static ASUS_CREATE_DEVICE_ATTR(infos); 904static ASUS_CREATE_DEVICE_ATTR(wlan); 905static ASUS_CREATE_DEVICE_ATTR(bluetooth); 906static ASUS_CREATE_DEVICE_ATTR(display); 907static ASUS_CREATE_DEVICE_ATTR(ledd); 908static ASUS_CREATE_DEVICE_ATTR(ls_switch); 909static ASUS_CREATE_DEVICE_ATTR(ls_level); 910static ASUS_CREATE_DEVICE_ATTR(gps); 911 912static struct attribute *asuspf_attributes[] = { 913 &dev_attr_infos.attr, 914 &dev_attr_wlan.attr, 915 &dev_attr_bluetooth.attr, 916 &dev_attr_display.attr, 917 &dev_attr_ledd.attr, 918 &dev_attr_ls_switch.attr, 919 &dev_attr_ls_level.attr, 920 &dev_attr_gps.attr, 921 NULL 922}; 923 924static struct attribute_group asuspf_attribute_group = { 925 .attrs = asuspf_attributes 926}; 927 928static struct platform_driver asuspf_driver = { 929 .driver = { 930 .name = ASUS_HOTK_FILE, 931 .owner = THIS_MODULE, 932 } 933}; 934 935static struct platform_device *asuspf_device; 936 937static void asus_hotk_add_fs(void) 938{ 939 ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL); 940 941 if (wl_switch_handle) 942 ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan); 943 944 if (bt_switch_handle) 945 ASUS_SET_DEVICE_ATTR(bluetooth, 0644, 946 show_bluetooth, store_bluetooth); 947 948 if (display_set_handle && display_get_handle) 949 ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp); 950 else if (display_set_handle) 951 ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp); 952 953 if (ledd_set_handle) 954 ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd); 955 956 if (ls_switch_handle && ls_level_handle) { 957 ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl); 958 ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw); 959 } 960 961 if (gps_status_handle && gps_on_handle && gps_off_handle) 962 ASUS_SET_DEVICE_ATTR(gps, 0644, show_gps, store_gps); 963} 964 965static int asus_handle_init(char *name, acpi_handle * handle, 966 char **paths, int num_paths) 967{ 968 int i; 969 acpi_status status; 970 971 for (i = 0; i < num_paths; i++) { 972 status = acpi_get_handle(NULL, paths[i], handle); 973 if (ACPI_SUCCESS(status)) 974 return 0; 975 } 976 977 *handle = NULL; 978 return -ENODEV; 979} 980 981#define ASUS_HANDLE_INIT(object) \ 982 asus_handle_init(#object, &object##_handle, object##_paths, \ 983 ARRAY_SIZE(object##_paths)) 984 985/* 986 * This function is used to initialize the hotk with right values. In this 987 * method, we can make all the detection we want, and modify the hotk struct 988 */ 989static int asus_hotk_get_info(void) 990{ 991 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 992 union acpi_object *model = NULL; 993 unsigned long long bsts_result, hwrs_result; 994 char *string = NULL; 995 acpi_status status; 996 997 /* 998 * Get DSDT headers early enough to allow for differentiating between 999 * models, but late enough to allow acpi_bus_register_driver() to fail 1000 * before doing anything ACPI-specific. Should we encounter a machine, 1001 * which needs special handling (i.e. its hotkey device has a different 1002 * HID), this bit will be moved. A global variable asus_info contains 1003 * the DSDT header. 1004 */ 1005 status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info); 1006 if (ACPI_FAILURE(status)) 1007 pr_warning("Couldn't get the DSDT table header\n"); 1008 1009 /* We have to write 0 on init this far for all ASUS models */ 1010 if (write_acpi_int(hotk->handle, "INIT", 0, &buffer)) { 1011 pr_err("Hotkey initialization failed\n"); 1012 return -ENODEV; 1013 } 1014 1015 /* This needs to be called for some laptops to init properly */ 1016 status = 1017 acpi_evaluate_integer(hotk->handle, "BSTS", NULL, &bsts_result); 1018 if (ACPI_FAILURE(status)) 1019 pr_warning("Error calling BSTS\n"); 1020 else if (bsts_result) 1021 pr_notice("BSTS called, 0x%02x returned\n", 1022 (uint) bsts_result); 1023 1024 /* This too ... */ 1025 write_acpi_int(hotk->handle, "CWAP", wapf, NULL); 1026 1027 /* 1028 * Try to match the object returned by INIT to the specific model. 1029 * Handle every possible object (or the lack of thereof) the DSDT 1030 * writers might throw at us. When in trouble, we pass NULL to 1031 * asus_model_match() and try something completely different. 1032 */ 1033 if (buffer.pointer) { 1034 model = buffer.pointer; 1035 switch (model->type) { 1036 case ACPI_TYPE_STRING: 1037 string = model->string.pointer; 1038 break; 1039 case ACPI_TYPE_BUFFER: 1040 string = model->buffer.pointer; 1041 break; 1042 default: 1043 string = ""; 1044 break; 1045 } 1046 } 1047 hotk->name = kstrdup(string, GFP_KERNEL); 1048 if (!hotk->name) 1049 return -ENOMEM; 1050 1051 if (*string) 1052 pr_notice(" %s model detected\n", string); 1053 1054 ASUS_HANDLE_INIT(mled_set); 1055 ASUS_HANDLE_INIT(tled_set); 1056 ASUS_HANDLE_INIT(rled_set); 1057 ASUS_HANDLE_INIT(pled_set); 1058 ASUS_HANDLE_INIT(gled_set); 1059 1060 ASUS_HANDLE_INIT(ledd_set); 1061 1062 /* 1063 * The HWRS method return informations about the hardware. 1064 * 0x80 bit is for WLAN, 0x100 for Bluetooth. 1065 * The significance of others is yet to be found. 1066 * If we don't find the method, we assume the device are present. 1067 */ 1068 status = 1069 acpi_evaluate_integer(hotk->handle, "HRWS", NULL, &hwrs_result); 1070 if (ACPI_FAILURE(status)) 1071 hwrs_result = WL_HWRS | BT_HWRS; 1072 1073 if (hwrs_result & WL_HWRS) 1074 ASUS_HANDLE_INIT(wl_switch); 1075 if (hwrs_result & BT_HWRS) 1076 ASUS_HANDLE_INIT(bt_switch); 1077 1078 ASUS_HANDLE_INIT(wireless_status); 1079 1080 ASUS_HANDLE_INIT(brightness_set); 1081 ASUS_HANDLE_INIT(brightness_get); 1082 1083 ASUS_HANDLE_INIT(lcd_switch); 1084 1085 ASUS_HANDLE_INIT(display_set); 1086 ASUS_HANDLE_INIT(display_get); 1087 1088 /* There is a lot of models with "ALSL", but a few get 1089 a real light sens, so we need to check it. */ 1090 if (!ASUS_HANDLE_INIT(ls_switch)) 1091 ASUS_HANDLE_INIT(ls_level); 1092 1093 ASUS_HANDLE_INIT(gps_on); 1094 ASUS_HANDLE_INIT(gps_off); 1095 ASUS_HANDLE_INIT(gps_status); 1096 1097 kfree(model); 1098 1099 return AE_OK; 1100} 1101 1102static int asus_input_init(void) 1103{ 1104 const struct key_entry *key; 1105 int result; 1106 1107 hotk->inputdev = input_allocate_device(); 1108 if (!hotk->inputdev) { 1109 pr_info("Unable to allocate input device\n"); 1110 return 0; 1111 } 1112 hotk->inputdev->name = "Asus Laptop extra buttons"; 1113 hotk->inputdev->phys = ASUS_HOTK_FILE "/input0"; 1114 hotk->inputdev->id.bustype = BUS_HOST; 1115 hotk->inputdev->getkeycode = asus_getkeycode; 1116 hotk->inputdev->setkeycode = asus_setkeycode; 1117 1118 for (key = asus_keymap; key->type != KE_END; key++) { 1119 switch (key->type) { 1120 case KE_KEY: 1121 set_bit(EV_KEY, hotk->inputdev->evbit); 1122 set_bit(key->keycode, hotk->inputdev->keybit); 1123 break; 1124 } 1125 } 1126 result = input_register_device(hotk->inputdev); 1127 if (result) { 1128 pr_info("Unable to register input device\n"); 1129 input_free_device(hotk->inputdev); 1130 } 1131 return result; 1132} 1133 1134static int asus_hotk_check(void) 1135{ 1136 int result = 0; 1137 1138 result = acpi_bus_get_status(hotk->device); 1139 if (result) 1140 return result; 1141 1142 if (hotk->device->status.present) { 1143 result = asus_hotk_get_info(); 1144 } else { 1145 pr_err("Hotkey device not present, aborting\n"); 1146 return -EINVAL; 1147 } 1148 1149 return result; 1150} 1151 1152static int asus_hotk_found; 1153 1154static int asus_hotk_add(struct acpi_device *device) 1155{ 1156 int result; 1157 1158 if (!device) 1159 return -EINVAL; 1160 1161 pr_notice("Asus Laptop Support version %s\n", 1162 ASUS_LAPTOP_VERSION); 1163 1164 hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL); 1165 if (!hotk) 1166 return -ENOMEM; 1167 1168 hotk->handle = device->handle; 1169 strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME); 1170 strcpy(acpi_device_class(device), ASUS_HOTK_CLASS); 1171 device->driver_data = hotk; 1172 hotk->device = device; 1173 1174 result = asus_hotk_check(); 1175 if (result) 1176 goto end; 1177 1178 asus_hotk_add_fs(); 1179 1180 asus_hotk_found = 1; 1181 1182 /* WLED and BLED are on by default */ 1183 write_status(bt_switch_handle, 1, BT_ON); 1184 write_status(wl_switch_handle, 1, WL_ON); 1185 1186 /* If the h/w switch is off, we need to check the real status */ 1187 write_status(NULL, read_status(BT_ON), BT_ON); 1188 write_status(NULL, read_status(WL_ON), WL_ON); 1189 1190 /* LCD Backlight is on by default */ 1191 write_status(NULL, 1, LCD_ON); 1192 1193 /* LED display is off by default */ 1194 hotk->ledd_status = 0xFFF; 1195 1196 /* Set initial values of light sensor and level */ 1197 hotk->light_switch = 1; /* Default to light sensor disabled */ 1198 hotk->light_level = 0; /* level 5 for sensor sensitivity */ 1199 1200 if (ls_switch_handle) 1201 set_light_sens_switch(hotk->light_switch); 1202 1203 if (ls_level_handle) 1204 set_light_sens_level(hotk->light_level); 1205 1206 /* GPS is on by default */ 1207 write_status(NULL, 1, GPS_ON); 1208 1209end: 1210 if (result) { 1211 kfree(hotk->name); 1212 kfree(hotk); 1213 } 1214 1215 return result; 1216} 1217 1218static int asus_hotk_remove(struct acpi_device *device, int type) 1219{ 1220 if (!device || !acpi_driver_data(device)) 1221 return -EINVAL; 1222 1223 kfree(hotk->name); 1224 kfree(hotk); 1225 1226 return 0; 1227} 1228 1229static void asus_backlight_exit(void) 1230{ 1231 if (asus_backlight_device) 1232 backlight_device_unregister(asus_backlight_device); 1233} 1234 1235#define ASUS_LED_UNREGISTER(object) \ 1236 if (object##_led.dev) \ 1237 led_classdev_unregister(&object##_led) 1238 1239static void asus_led_exit(void) 1240{ 1241 destroy_workqueue(led_workqueue); 1242 ASUS_LED_UNREGISTER(mled); 1243 ASUS_LED_UNREGISTER(tled); 1244 ASUS_LED_UNREGISTER(pled); 1245 ASUS_LED_UNREGISTER(rled); 1246 ASUS_LED_UNREGISTER(gled); 1247} 1248 1249static void asus_input_exit(void) 1250{ 1251 if (hotk->inputdev) 1252 input_unregister_device(hotk->inputdev); 1253} 1254 1255static void __exit asus_laptop_exit(void) 1256{ 1257 asus_backlight_exit(); 1258 asus_led_exit(); 1259 asus_input_exit(); 1260 1261 acpi_bus_unregister_driver(&asus_hotk_driver); 1262 sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group); 1263 platform_device_unregister(asuspf_device); 1264 platform_driver_unregister(&asuspf_driver); 1265} 1266 1267static int asus_backlight_init(struct device *dev) 1268{ 1269 struct backlight_device *bd; 1270 1271 if (brightness_set_handle && lcd_switch_handle) { 1272 bd = backlight_device_register(ASUS_HOTK_FILE, dev, 1273 NULL, &asusbl_ops); 1274 if (IS_ERR(bd)) { 1275 pr_err("Could not register asus backlight device\n"); 1276 asus_backlight_device = NULL; 1277 return PTR_ERR(bd); 1278 } 1279 1280 asus_backlight_device = bd; 1281 1282 bd->props.max_brightness = 15; 1283 bd->props.brightness = read_brightness(NULL); 1284 bd->props.power = FB_BLANK_UNBLANK; 1285 backlight_update_status(bd); 1286 } 1287 return 0; 1288} 1289 1290static int asus_led_register(acpi_handle handle, 1291 struct led_classdev *ldev, struct device *dev) 1292{ 1293 if (!handle) 1294 return 0; 1295 1296 return led_classdev_register(dev, ldev); 1297} 1298 1299#define ASUS_LED_REGISTER(object, device) \ 1300 asus_led_register(object##_set_handle, &object##_led, device) 1301 1302static int asus_led_init(struct device *dev) 1303{ 1304 int rv; 1305 1306 rv = ASUS_LED_REGISTER(mled, dev); 1307 if (rv) 1308 goto out; 1309 1310 rv = ASUS_LED_REGISTER(tled, dev); 1311 if (rv) 1312 goto out1; 1313 1314 rv = ASUS_LED_REGISTER(rled, dev); 1315 if (rv) 1316 goto out2; 1317 1318 rv = ASUS_LED_REGISTER(pled, dev); 1319 if (rv) 1320 goto out3; 1321 1322 rv = ASUS_LED_REGISTER(gled, dev); 1323 if (rv) 1324 goto out4; 1325 1326 led_workqueue = create_singlethread_workqueue("led_workqueue"); 1327 if (!led_workqueue) 1328 goto out5; 1329 1330 return 0; 1331out5: 1332 rv = -ENOMEM; 1333 ASUS_LED_UNREGISTER(gled); 1334out4: 1335 ASUS_LED_UNREGISTER(pled); 1336out3: 1337 ASUS_LED_UNREGISTER(rled); 1338out2: 1339 ASUS_LED_UNREGISTER(tled); 1340out1: 1341 ASUS_LED_UNREGISTER(mled); 1342out: 1343 return rv; 1344} 1345 1346static int __init asus_laptop_init(void) 1347{ 1348 int result; 1349 1350 if (acpi_disabled) 1351 return -ENODEV; 1352 1353 result = acpi_bus_register_driver(&asus_hotk_driver); 1354 if (result < 0) 1355 return result; 1356 1357 /* 1358 * This is a bit of a kludge. We only want this module loaded 1359 * for ASUS systems, but there's currently no way to probe the 1360 * ACPI namespace for ASUS HIDs. So we just return failure if 1361 * we didn't find one, which will cause the module to be 1362 * unloaded. 1363 */ 1364 if (!asus_hotk_found) { 1365 acpi_bus_unregister_driver(&asus_hotk_driver); 1366 return -ENODEV; 1367 } 1368 1369 result = asus_input_init(); 1370 if (result) 1371 goto fail_input; 1372 1373 /* Register platform stuff */ 1374 result = platform_driver_register(&asuspf_driver); 1375 if (result) 1376 goto fail_platform_driver; 1377 1378 asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1); 1379 if (!asuspf_device) { 1380 result = -ENOMEM; 1381 goto fail_platform_device1; 1382 } 1383 1384 result = platform_device_add(asuspf_device); 1385 if (result) 1386 goto fail_platform_device2; 1387 1388 result = sysfs_create_group(&asuspf_device->dev.kobj, 1389 &asuspf_attribute_group); 1390 if (result) 1391 goto fail_sysfs; 1392 1393 result = asus_led_init(&asuspf_device->dev); 1394 if (result) 1395 goto fail_led; 1396 1397 if (!acpi_video_backlight_support()) { 1398 result = asus_backlight_init(&asuspf_device->dev); 1399 if (result) 1400 goto fail_backlight; 1401 } else 1402 pr_info("Brightness ignored, must be controlled by " 1403 "ACPI video driver\n"); 1404 1405 return 0; 1406 1407fail_backlight: 1408 asus_led_exit(); 1409 1410fail_led: 1411 sysfs_remove_group(&asuspf_device->dev.kobj, 1412 &asuspf_attribute_group); 1413 1414fail_sysfs: 1415 platform_device_del(asuspf_device); 1416 1417fail_platform_device2: 1418 platform_device_put(asuspf_device); 1419 1420fail_platform_device1: 1421 platform_driver_unregister(&asuspf_driver); 1422 1423fail_platform_driver: 1424 asus_input_exit(); 1425 1426fail_input: 1427 1428 return result; 1429} 1430 1431module_init(asus_laptop_init); 1432module_exit(asus_laptop_exit); 1433